# What this PR does
Instead of always adding `.aiff` or `.mp3` at the end of notification
sound names depending on the platform (iOS vs Android), add them only if
no extension is present already. This should make it possible to use
sounds with custom extensions.
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
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